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Chemistry > Cracking Hydrocarbons > Flashcards

Cracking Hydrocarbons Flashcards

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0
Q

Two properties of short chain hydrocarbons?

A

Thin and pale with a low boiling point

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1
Q

Two properties of long chain hydrocarbons?

A

High boiling points and viscous (gloopy)

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2
Q

What has higher demand - long or short chain hydrocarbons?

A

Short

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3
Q

How do they meet this demand?

A

CRACKING!

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4
Q

Cracking is a form of?

A

Thermal decomposition

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5
Q

Cracking produces?

A

Shorter hydrocarbons and alkenes (which are used in polymers)

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6
Q

What state are hydrocarbons in when they pass over the catalysts?

A

Vaporised

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7
Q

What do you you heat in the cracking process?

A

Both the paraffin and the catalyst until the paraffin has vaporised and the catalyst is glowing red.

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8
Q

Two catalysts?

A

Silica and alumina

SiO2 Al203

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9
Q

After heating what happens next?

A

Smaller alkanes collect in the test tube while alkenes bubble through water and are collected in a gas jar

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Chemistry (5 decks)

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